MacDon R85 Rotary Disc 13 Foot - Manual (Page 59)

OPERATION
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Revision C
6.12.7 Cutting Height
Cutting height is determined by a combination of
the angle of the cutterbar/header, and the skid
shoe settings.
Cutting height should be adjusted for optimum
cutting performance without allowing excessive
build-up of mud and soil inside the header that
can lead to poor crop flow and increased wear
on cutting components.
Choose an angle that maximizes performance
for your crop and field conditions. Refer to
Section 6.12.6 Header Angle.
Optional adjustable skid shoes are available to
also provide different cutting heights as
described below: Refer to Section 9 OPTIONS
AND ATTACHMENTS.
 Lowering the skid shoes or decreasing
header angle increases the cutting
height. This may be desirable in stony
conditions, to reduce damage to cutting
components. Also, a longer stubble
length helps material dry faster.
 Raising the skid shoes and increasing
header angle allows the crop to be
shaved.
To minimize damage to cutterbar components,
scooping soil, or soil build-up at the cutterbar in
damp conditions, header float should be set as
light as possible without causing excessive
bouncing.
When the float setting is light, it may be
necessary to use a slower ground speed to
avoid excessive bouncing and leaving a ragged
cut.
Set up the header as follows:
DANGER
To avoid bodily injury or death from
unexpected start-up or fall of raised
machine: stop engine, remove key, and
engage header lift cylinder stops before
going under machine for any reason.
a. Raise header fully, stop engine, and remove
key.
b. Remove bolts (A).
c. Raise or lower skid shoe.
d. Re-install bolts (A).
e. Repeat for skid shoe at opposite end of header.
f. Check header float as described in Section
6.12.1 Header Float.
g. Adjust header angle to desired working position
using the machine's header angle controls. If
angle is not critical, set it to mid-position. Refer
to Section 6.12.6 Header Angle for more
information.
A